Unit sole



FIG. 1 is a front and side perspective view of a unit sole showing my new design;

FIG. 2 is a bottom and side perspective view thereof;

FIG. 3 is a front elevational view thereof;

FIG. 4 is a rear elevational view thereof;

FIG. 5 is a top plan view thereof; and

FIG. 6 is a bottom plan view thereof. 

The ornamental design for a unit sole, substantially as shown and described. 